whacky labs - Latest Comments

Re: Experiment 14: Object Picking

梁建锋 — Sun, 06 Sep 2015 06:07:48 -0000

HI chunkyguy, thanks for your useful article.I also have a question want to ask.Through the demo i found that when my camera rotate to the opposite of the object, ray test is true too,how can fix it,or any idea?

Re: C++: Typesafe programming

amitp — Fri, 08 Aug 2014 00:20:55 -0000

Cool. I do something similar.

One additional distinction I make sometimes but not always: the difference of things might be a different type from the thing itself. For example, Temperature Celsius and Temperature Fahrenheit could be separate types. Converting F to C is (x-32)*5/9. However, suppose I talk about an “increase of 4°F”. Converting that to an “increase in °C” should not be (x-32)*5/9 but instead x*5/9.

I then define temp + temp = invalid, temp + ∆temp = temp, temp - ∆temp = temp, temp - temp = ∆temp, ∆temp + ∆temp = ∆temp, ∆temp - ∆temp = ∆temp. For conversions, tempF to tempC is (x-32)*5/9 but ∆tempF to ∆tempC is x*5/9. And tempF to ∆tempC and other such things are not defined. Scalar multiplication is allowed for ∆temp but not for temp.

Geometric points and vectors work this way too. You don't add two points, but you can add a point and a vector to make another point, or subtract two points to produce a vector. Scalar multiplication is allowed for vectors but not for points.

You can consolidate temp and ∆temp, or point and vector, by adding an int template parameter. When it's 0, it represents differences (∆temp or a geometric vector); when it's 1, it represents positions (temp or a geometric point). The static type for + will add the ints; the static type for - will subtract the ints. Now all those rules for which of {temp, ∆temp} we're allowed to add or subtract correspond to the ints: 0 and 1 are allowed, but other values are not; scalar multiplication multiplies the int. Try to add two points? 1 + 1 = 2, which isn't valid. Try to add two vectors? 0 + 0 = 0, which is a vector. Add a point and vector? 1 + 0 = 1, which is a point. Subtract two points? 1 - 1 = 0, which is a vector.

Re: Experiment 13: Shadow mapping

el — Sun, 03 Aug 2014 03:50:45 -0000

I'm quite new to Metal but I don't think so. Metal API main purpose is minimizing cpu driver overhead. It cannot reprogram dependent texture reading, tile base rendering, etc.. they are hw gpu features.

Re: Experiment 13: Shadow mapping

chunkyguy — Sun, 03 Aug 2014 03:32:32 -0000

I think with the arrival of Metal API on iOS things are going to change for good.

Re: Experiment 13: Shadow mapping

el — Thu, 17 Jul 2014 06:17:05 -0000

i don't think that shadow mapping has on ios any future. Because dependent texture reads it's too slow. Projected shadows, stencil shadows etc. are much better solution.

Re: Experiment 14: Object Picking

MANOJ KUMAR K — Thu, 19 Jun 2014 10:08:56 -0000

Thanks a lot.

Re: Experiment 14: Object Picking

luo — Tue, 01 Apr 2014 06:42:16 -0000

hi Sidharth Juyal, thanks for your post, I want to achieve the same function like your tutorials , but I hope to use color picking , just like this : http://stackoverflow.com/qu.... I'm new to opengl and hoping a working model will help me to implement this function.
If you can provide a tutorial, it would be perfect. many thanks. luo

Re: Ludo for iOS

Zeeshan Ali Basbasah — Sun, 22 Dec 2013 13:57:35 -0000

thanks dear for this post

Re: Programming Languages in a nutshell

Matthew Hughes — Sun, 24 Feb 2013 12:40:00 -0000

What type of transportation medium is Clojure? ;)

Re: Making an iPhone game from scratch

CraftyDeano — Tue, 13 Nov 2012 09:17:04 -0000

Great post. Thank you for sharing your experience in becoming a game dev.

Re: Making an iPhone game from scratch

chunkyguy — Tue, 13 Nov 2012 04:37:29 -0000

I've the entire dev log here, with screenshots and videos, if you're into that http://whackylabs.com/rants...

Re: Making an iPhone game from scratch

foo — Tue, 13 Nov 2012 03:31:48 -0000

needs screenshots and videos

Re: Cleaning up the 3 hour mess

max — Thu, 09 Aug 2012 11:50:26 -0000

great sid ..nice to c ur dedication..!!
I like the quote.... Never leave the project in a broken state..!!All d best for ur upcoming projects..!!

Re: What language should I speak to my computer?

Alok — Fri, 30 Dec 2011 05:52:33 -0000

No need to delete google Ad's .. I don't know whether you know it or not Google too values good genuine stuff .It will pay you in no time ..keep it on and up :-)

Take Care
----------
Alok S. Rana

Re: What language should I speak to my computer?

chunkyguy — Thu, 29 Dec 2011 10:48:28 -0000

Thanks buddy! The google ads is a just a trial thing, if I don't make any money with it soon I would delete that :)

Re: What language should I speak to my computer?

Alok — Thu, 29 Dec 2011 02:39:36 -0000

All the Best Sid for your Rambling , I am pretty much sure One Day you'll achieve your goal in most meaningful way.
As usual nice Article ,though I didn't get it complete.

Believe me you have a knack of putting things in a unique way !!! M loving it . :)

Last but not the least .. ..

NICE TO SEE GOOGLE AD'S FLASHING ON THE SCREEN .. It's always Good to Earn while you learn ) :-)

Take care

--------------
Alok S. Rana

Re: 10 Things nobody tells the OpenGL noob

Manojrana009 — Thu, 29 Dec 2011 00:11:49 -0000

Awesome man .. !!! @sid with his best.

Re: Ultimate Algorithm: Death

ALOK — Thu, 07 Jul 2011 03:56:48 -0000

Awesome Dude .. though i understand only few part of it ..still great i believe

Re: iOS: Moving in and out of NSLogs.

chunkyguy — Tue, 24 May 2011 11:00:31 -0000

I import SJLogger.h, yes there's a warning and I'm planning on to upgrade the code to add conditional level flags like:DEADLY, WARNING, INFO,.. something like the Java's Logger class.
But for now its serving the purpose :)

Re: iOS: Moving in and out of NSLogs.

Laurent Tarral — Tue, 24 May 2011 05:50:02 -0000

Thanks! And do you #import the SJLogger.h (I get some warnings but it works) or the SJLogger.m (I get an error) in the classes which use SJLog?

Re: My life in KEC

Alok S. Rana — Sat, 14 May 2011 05:32:41 -0000

Great Work Sid >>> I Truly Admire You

Re: My life in KEC

Nikhil Chandel — Fri, 25 Mar 2011 00:51:05 -0000

ha ha ha ha nice Sid

Re: Redundancy issue with Universal Projects’s AppDelegate classes

student loan — Mon, 07 Mar 2011 00:35:45 -0000

I will try this for sure.

Re: Making singleton class secure

chunkyguy — Fri, 18 Feb 2011 17:16:25 -0000

the __secret_init is just a random name that I've made so that I don't accidentally call it up from another class, more like a private method. You can of course by pass all that, doing something like:
+(World *)sharedWorld
{
if(!_world) {
_world = [[self alloc] init];
[_world setup_world];
}
return _world;
}

The main idea is to just avoid accidental allocating a new instance of World class.
Raising new question: you've already done that :)

Re: Making singleton class secure

akd — Thu, 17 Feb 2011 23:19:54 -0000

Hey great tutorial... but what is the use of method named "-(id)__secret_init"..
tell me one thing... how can i raise a new question on this portal?